Stage 1 · Lesson 10 of 10
HTTP methods and status codes
The says what the client wants to do. GET reads, POST creates something or triggers an action, PUT replaces a thing, PATCH changes part of it and DELETE removes it. Two properties matter for everything later.
Safe methods (GET, HEAD) change nothing on the server. Idempotent methods (GET, PUT, DELETE) have the same effect whether they run once or five times. That decides what a client may safely retry after a timeout.
are three-digit answers grouped by their first digit: 2xx means success, 3xx a , 4xx the client's fault and 5xx the server's fault. Learn 200, 201, 204, 301, , 400, 401, 403, 404, 409, 422, , 500 and 503 by heart.
Common trapreturning 200 with an error message in the body, which misleads every client and monitor.
A question to check yourself, an AI practice session and 2 cheat sheet entries come with the full roadmap. Unlock
Resources for this stage
Start with· follow one of these
- BookFreeThe Rust Programming Language
The Rust Project · Beginner
The official book, free online: read ownership, enums, error handling and traits slowly
- GuideFreeTokio Tutorial
Tokio · Intermediate
The official Tokio tutorial: tasks, shared state, channels and the async model Axum runs on
Practise
Keep handy
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